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Feline leukemia: a review leukemia
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Nogueira, Marina Moller

; Bruno, Leonardo Loures Garcia

; Melo, Marília Martins

Ciência Rural

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2025, Volume 55 N. 1 elocation e20240001

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO: Dentre as neoplasias hematopoiéticas, as leucemias são originadas pelas células mieloides ou linfoides na medula óssea, podendo ser de forma aguda, com um pior prognóstico, principalmente, acometendo gatos com leucemia felina (FeLV positivos) ou, de forma crônica, que apresentam um prognostico reservado, especialmente em gatos idosos. As leucemias possuem várias classificações, cujas diferenciações irão depender de exames complementares como hemograma, mielograma, citologia e citometria de fluxo, importantes para a caracterização e para o melhor tratamento do animal. RESUMO hematopoiéticas óssea aguda prognóstico principalmente FeLV positivos crônica reservado idosos classificações hemograma mielograma fluxo animal

ABSTRACT: Among the hematopoietic neoplasms, leukemias are caused by myeloid or lymphoid cells in the bone marrow, which can either be acute with an unfavorable prognosis and mostly affect cats that tested positive for feline viral leukemia (FeLV) or chronic in older cats that have a poor prognosis. Leukemias have several classifications in which the differentiation depends on complementary tests, such as blood profile, myelogram, cytology. and flow cytometry, which help determine the best treatment for the animal. ABSTRACT neoplasms marrow FeLV (FeLV tests profile myelogram cytology cytometry animal

https://doi.org/10.1590/0103-8478cr20240001

Agaricus blazei Murill on tissue damage caused by Ehrlich tumor
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Verçosa Júnior, Durval

; Botelho, Ana Flávia Machado

; Cassali, Geovanni Dantas

; Melo, Marília Martins

Ciência Animal Brasileira

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2024, Volume 25 elocation 78091E

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Agaricus blazei Murill (ABM) é comercializado mundialmente como alimento medicinal com potencial anticancerígeno. O estudo investigou os efeitos de diferentes extratos de ABM em um modelo de camundongo com tumor de Ehrlich (TE). Diferentes extratos foram produzidos utilizando solução com pH 4 e 7, banho-maria ou banho ultrassônico, com solução de polissacarídeo ou sobrenadante. Camundongos Swiss (n=192) foram separados aleatoriamente em 4 grupos para avaliação dos 4 métodos de extração. Cada grupo de extração consistiu em 2 grupos com ou sem tumor, separados em 4 grupos de tratamento. As avaliações incluíram peso dos órgãos e histologia do baço, rim, gânglios linfáticos, fígado e tumor. Os animais com TE (sem tratamento) apresentaram aumento do peso relativo do baço, todavia, nos animais com TE e tratados com o sobrenadante de ABM a 60ºC em pH 7, houve diminuição do peso do baço. O peso do fígado também reduziu em animais com TE, mas tratados com extrato ABM a 60ºC em pH 4. Os achados histológicos do baço mostraram aumento no número de macrófagos e, em alguns casos, observou-se leve hipoplasia de polpa branca. Duas frações foram obtidas no extrato de ABM a 60ºC em banho ultrassônico, a sobrenadante e a polissacarídica, e os animais com TE tratados com a fração de sobrenadante mostraram uma menor celularidade tumoral e uma menor distância entre a epiderme e a musculatura. Na epiderme das patas desses animais foram vistas áreas livres de células tumorais, menores áreas de necrose e infiltração celular, demonstrando menor crescimento tumoral. Os resultados sinalizam que o extrato de ABM a 60ºC em pH 7 produzido através de banho ultrassônico tem o maior potencial terapêutico que deve ser mais explorado. (ABM anticancerígeno TE. . (TE) banhomaria maria n=192 n192 n 192 (n=192 tratamento rim linfáticos todavia ºC casos observouse observou se branca polissacarídica musculatura tumorais celular explorado (TE n=19 n19 19 (n=19 n=1 n1 1 (n=1 n= (n= (n

Abstract Agaricus blazei Murill (ABM) is commercialized worldwide as a medicinal food with anticancer potential. The study investigated the effects of different ABM extracts on a mouse model of transplatable Ehrlich tumor. Different extracts were produced using a solution with pH 4 and 7, water bath or ultrasonic bath, with polysaccharide solution or supernatant. 192 mice were randomly separated into 4 groups for assessment of the 4 extraction methods. Each extraction group consisted of 2 groups with or without a tumor, further separated into 4 treatment groups. Evaluations included organ weight and histology of the spleen, kidney, lymph nodes, liver, and tumor. Ehrlich’s tumor leads to an increase in the relative weight of the spleen, but the use of ABM supernatant at 60ºC at pH 7 decreases the weight of the spleen. Liver weight was reduced with extract ABM at 60ºC in pH 4. Histology findings for the spleen showed an increase in the number of macrophages and, in some cases, mild white pulp hypoplasia. In animals treated with ABM supernatant solution (60ºC and ultrasonic bath), when compared to animals treated with ABM polysaccharide solution (60ºC and ultrasonic bath), less tumor cellularity, smaller distance between the epidermis and the musculature, can be observed. Free areas of tumor cells in the epidermis of the foot padsand smaller areas of necrosis and cellular infiltration were observed, demonstrating less tumor growth in these animals. The findings indicate that ABM extract at 60ºC at pH 7 produced through an ultrasonic bath has the most therapeutic potential that should be further explored. (ABM 19 methods kidney nodes liver Ehrlichs s ºC cases hypoplasia , bath) cellularity musculature observed explored 1

https://doi.org/10.1590/1809-6891v25e-78091e

Protective effects of mesenchymal stromal cell-derived secretome on dermonecrosis induced in rabbits by Loxosceles intermedia spider venom cellderived cell derived
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Rodrigues, Gabriela Marques

; Almeida, Mara Elvira de

; Marcelino, Sóstenes Apolo Correia

; Fernandes, Paula Bretas Ullmann

; Cruz, Jessica Oliveira Pereira da

; Araújo, Françoise Louanne

; Ferreira, Raquel da Silva

; Botelho, Ana Flávia Machado

; Bedoya, Francisco Javier

; Cahuana, Gladys Margot

; Hitos, Ana Belén

; Soria, Bernat

; Costal-Oliveira, Fernanda

; Duarte, Clara Guerra

; Tejedo, Juan R.

; Chávez-Olórtegui, Carlos

; Melo, Marília Martins

Journal of Venomous Animals and Toxins including Tropical Diseases

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2024, Volume 30 elocation e20240004

Abstract: En | Text: En | PDF: En

Abstract Background: Loxoscelism refers to a set of clinical manifestations caused by the bite of spiders from the Loxosceles genus. The classic clinical symptoms are characterized by an intense inflammatory reaction at the bite site followed by local necrosis and can be classified as cutaneous loxoscelism. This cutaneous form presents difficult healing, and the proposed treatments are not specific or effective. This study aimed to evaluate the protective effect of mesenchymal stromal cells-derived secretome on dermonecrosis induced by Loxosceles intermedia spider venom in rabbits. Methods: Sixteen rabbits were distributed into four groups (n = 4). Except for group 1 (G1), which received only PBS, the other three groups (G2, G3, and G4) were initially challenged with 10 μg of L. intermedia venom, diluted in 100 μL of NaCl 0.9%, by intradermic injection in the interscapular region. Thirty minutes after the challenge all groups were treated with secretome, except for group 2. Group 1 (G1-control group) received intradermal injection (ID) of 60 μg of secretome in 0.15 M PBS; Group 2 (G2) received 0.9% NaCl via ID; Group 3 (G3) received 60 μg of secretome, via ID and Group 4 (G4), received 60 μg of secretome by intravenous route. Rabbits were evaluated daily and after 15 days were euthanized, necropsied and skin samples around the necrotic lesions were collected for histological analysis. Results: Rabbits of G1 did not present edema, erythema, hemorrhagic halo, or necrosis. In animals from G2, G3, and G4, edema appeared after 6h. However, minor edema was observed in the animals of G2 and G3. Hemorrhagic halo was observed in animals, six hours and three days after, on G2, G3, and G4. Macroscopically, in G4, only one animal out of four had a lesion that evolved into a dermonecrotic wound. No changes were observed in the skin of the animals of G1, by microscopic evaluation. All animals challenged with L. intermedia venom showed similar alterations, such as necrosis and heterophilic infiltration. However, animals from G4 showed fibroblast activation, early development of connective tissue, neovascularization, and tissue re-epithelialization, indicating a more prominent healing process. Conclusion: These results suggest that secretome from mesenchymal stromal cells cultured in a xeno-free and human component-free culture media can be promising to treat dermonecrosis caused after Loxosceles spiders bite envenoming. Background genus loxoscelism effective cellsderived derived Methods n 4. . 4) G , (G1) PBS (G2 G3 L 09 0 9 region G1control Gcontrol control (ID 6 015 0.1 0.9 (G3 (G4) route euthanized analysis Results erythema 6h h However Macroscopically wound evaluation alterations infiltration activation neovascularization reepithelialization, reepithelialization re epithelialization, epithelialization re-epithelialization process Conclusion xenofree xeno free componentfree component envenoming (G1 (G 01 0. (G4

https://doi.org/10.1590/1678-9199-jvatitd-2024-0004

Doxorubicin cardiotoxicity and Camellia sinensis cardioprotection determined by speckle-tracking echocardiography speckletracking speckle tracking
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Barreto, Maira Souza Oliveira

; Carvalho, Juliana Lott

; Melo, Marcos Barrouin

; Michel, Ana Flávia Ribeiro Machado

; Ferreira, Marina Guimarães

; Muzzi, Ruthnéa Aparecida Lázaro

; Goes, Alfredo Miranda de

; Melo, Marilia Martins

Brazilian Journal of Pharmaceutical Sciences

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2023, Volume 59 elocation e23063

Abstract: En | Text: En | PDF: En

Abstract Doxorubicin (Dox) is a medication used in the treatment of cancerous tumors and hematologic malignancies with potentially serious side effects, including the risk of cardiotoxicity. Flavonoids are plant metabolites with antioxidant properties and can be extracted from Camellia sinensis (CS). The aim of this study is to evaluate the possible cardioprotective effect of CS against injuries induced by Dox in rats. A total of 32 animals were distributed into four groups: (1) control - intraperitoneal injection (I.P.) of 0.5 mL saline weekly and 1.0 mL water by gavage daily; (2) CS - 0.5 mL saline I.P. weekly and 200 mg/kg CS by gavage daily; (3) Dox - 5.0 mg/kg Dox I.P. weekly and 1.0 mL water by gavage daily; and (4) Dox+CS -5.0 mg/kg Dox I.P. weekly and 200 mg/kg CS by gavage daily. Clinical examinations, blood profiles, electrocardiograms, echocardiograms, and histological analyses of hearts were performed over 25 days. The animals in the Dox group showed changes in body weight and in erythrogram, leukogram, electrocardiography, and echocardiography readings. However, animals from the dox+CS group had significantly less change in body weight, improved cardiac function, and showed more preserved cardiac tissue. This study demonstrated that CS prevents dox-induced cardiotoxicity, despite enhancing the cytotoxic effect on blood cells. (Dox effects cardiotoxicity CS. . (CS) rats 3 groups 1 (1 IP I P (I.P. 05 0 5 0. 10 1. daily 2 (2 I.P 20 mgkg mg kg (3 50 5. 4 (4 DoxCS -5. examinations profiles electrocardiograms echocardiograms days erythrogram leukogram electrocardiography readings However doxCS dox function tissue doxinduced cells (CS ( (I.P -5

https://doi.org/10.1590/s2175-97902023e23063

Ciência da disseminação e implementação em países de língua portuguesa: por que considerar? portuguesa considerar
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Sala, Danila Cristina Paquier

; Okuno, Meiry Fernanda Pinto

; Buccini, Gabriela

; Hankins, Jane Silva

; Câmara, Alice Barros

; Vieira, Ana Claudia

; Horta, Ana Lucia de Moraes

; Varela, Andrea Liliana Vesga

; Trapé, Carla Andrea

; Treichel, Carlos Alberto dos Santos

; Luizaga, Carolina Terra de Moraes

; Oliveira, Cintia de Freitas

; Luquine Jr, Cézar D

; Bonfim, Daiana

; Melo, Daiane Sousa

; Fatori, Daniel

; Bernardo, Debora

; Silva, Flávio Dias

; Paiva Neto, Francisco Timbó de

; Sousa, Girliani Silva de

; Relvas, Gláubia Rocha Barbosa

; Eshriqui, Ilana

; Chavez, Leidy Janeth Erazo

; Almeida, Leticia Yamawaka de

; Godoi, Lídia Pereira da Silva

; Belotti, Lorrayne

; Corrêa, Lucas Hernandes

; Cordeiro, Luciana

; Hespanhol, Luiz

; Juskevicius, Luize Fábrega

; Padoveze, Maria Clara

; Bueno, Mariana

; Siqueira, Marina Martins

; Bortoli, Maritsa Carla de

; Louvison, Marília Cristina Prado

; Cardoso, Marília Mastrocolla de Almeida

; Becker, Natália

; Tanaka, Oswaldo Yoshimi

; Costa, Paula Cristina Pereira da

; Bomfim, Rafael Aiello

; Luz, Reginaldo Adalberto

; Gimbel, Sarah

; Dias, Sónia

; Castral, Thaíla Corrêa

; Domingos, Thiago da Silva

; Baumann, Ana A.

Acta Paulista de Enfermagem

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2023, Volume 36 Suppl. 1 elocation eEDT01

Abstract: Pt | Text: Pt | PDF: Pt

https://doi.org/10.37689/acta-ape/2023edtspe01

In vitro toxicity of Niedenzuella (Tetrapterys) multiglandulosa on bovine embryos
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Bull, Valquíria

; Leite, Ana Carolina

; Botelho, Ana Flávia Machado

; Silva, Rayanne Henrique Santana da

; Silva, Eliane Beatriz Magalhães

; Soto-Blanco, Benito

; Nepomuceno, Anelise de Carvalho

; Borges, Álan Maia

; Melo, Marília Martins

Ciência Animal Brasileira

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2022, Volume 23 elocation e71762

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Niedenzuella (Tetrapterys) multiglandulosa, uma videira encontrada no Brasil, tem sido correlacionada a surtos de intoxicações em bovinos e búfalos, gerando perdas econômicas relacionadas à morte por insuficiência cardíaca, aborto, natimorto e mortalidade neonatal. O objetivo deste estudo foi examinar o potencial embriotóxico do extrato vegetal aquoso em embriões bovinos in vitro. O estudo in vitro foi realizado em cinco repetições de cultura de embriões bovinos distribuídos em dois grupos: controle, meio de cultura de embriões in vitro sem o extrato aquoso da planta; grupo tratado, com adição de 2,7mg / mL de extrato vegetal aquoso (10%) à cultura do embrião no sexto dia de cultivo. A taxa de clivagem foi avaliada no dia 2 da cultura de células. Viabilidade, eclodibilidade e subdesenvolvimento de blastocistos no sétimo, oitavo e nono dia (D7, D8 e D9, respectivamente) de cultura foram avaliados em microscópio estereoscópico. No dia 7, os blastocistos foram submetidos ao ensaio TUNEL para determinar o índice apoptótico. Observamos redução significativa da produção de blastocisto / número de embriões clivados (60,6% vs 41,5%); redução da produção de blastocistos / número total de oócitos bovinos maturados (35,1% vs 21,3%); e taxas de eclosão embrionária (38,0% vs 10,0%). No entanto, nenhum efeito foi observado na taxa de apoptose. Em conclusão, o extrato aquoso das folhas de N. multiglandulosa reduz a viabilidade do embrião bovino in vitro, sugerindo possíveis efeitos prejudiciais no desenvolvimento embrionário.

Abstract Niedenzuella (Tetrapterys) multiglandulosa, a vine plant found in Brazil, has been correlated to outbreaks of poisoning in cattle and buffaloes, generating economic losses related to the death due to heart failure, miscarriage, abortion, stillbirth, and neonatal mortality. The aim of this study was to examine the embryotoxic potential of the aqueous plant extract on in vitro bovine embryos. In vitro study was performed in five replicates of bovine embryo culture assigned in two groups: control, in vitro embryo culture medium without the aqueous plant extract; treated group, with addition of 2.7mg/mL of aqueous plant extract (10%) to the embryo culture on the sixth day of culture. Cleavage rate was evaluated at day 2 of the cell culture. Viability, hatchability and underdevelopment of blastocysts on the seventh, eighth, and ninth days (D7, D8, and D9, respectively) of culture were assessed under stereoscopic microscope. On day 7, blastocysts were submitted to TUNEL assay to determine apoptotic index. In vitro exposure of bovine embryos to of N. multiglandulosa resulted in reduced embryo development and survival, evaluated by dark cytoplasm indicating poor morphology and poor quality with marked reduction of hatchability. We observed a significant reduction of blastocyst production/number of cleaved embryos (60.6% vs 41.5%); reduction of blastocysts production/total number of matured bovine oocytes (35.1% vs 21.3%); and embryonic hatching rates (38.0% vs 10.0%). However, no effects were observed on the apoptotic rate. In conclusion, aqueous extract of N. multiglandulosa leaves reduces bovine embryo viability in vitro, suggesting possible detrimental effects on embryo development.

https://doi.org/10.1590/1809-6891v23e-71762e

Evaluation of mesenchymal cells and dapsone for the treatment of dermonecrotic wounds caused by Loxosceles laeta venom in rabbits
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Martins, Guilherme de Caro

; Barreto, Maira Souza Oliveira

; Botelho, Ana Flávia Machado

; Gamba, Conrado

; Duarte, Clara Guerra

; Soto-Blanco, Benito

; Bicalho, Adriane Pimenta Costa-Val

; Cassali, Geovanni Dantas

; Goes, Alfredo Miranda de

; Olórtegui, Carlos Delfin Chávez

; Melo, Marília Martins

Ciência Animal Brasileira

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2022, Volume 23 elocation e-72573E

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Este estudo teve como objetivo avaliar a eficácia das células-tronco mesenquimais (CTMs), isoladas ou associadas à dapsona (DAP), no tratamento de feridas dermonecróticas causadas pelo veneno de Loxosceles laeta. Vinte e cinco coelhos machos foram distribuídos em cinco grupos. O controle negativo recebeu água ultrapura (C-), enquanto todos os outros grupos foram injetados com 20 μg de veneno de L. laeta. Após 4 horas, cada grupo recebeu um dos seguintes tratamentos: PBS (C+), DAP, CTMs e DAP + CTMs. Os animais foram avaliados diariamente durante 12 dias, e feitos registros fotográficos para análise da ferida e no 12º dia, foram eutanasiados e, retiradas amostras de pele para análise histológica. Observou-se que a DAP apresentou o melhor percentual de contração da ferida no terceiro dia. Nos tratamentos com CTMs, observou-se uma contração negativa da ferida tanto para as CTMs isoladas, bem como a associação CTMs + DAP em relação ao PBS, possivelmente, pelo aumento da infamação inicial após a aplicação de células-tronco. Isso é devido ao fato de que as CTMs secretam um amplo espectro de moléculas bioativas como citocinas e fatores de crescimento que favorecem a regeneração. Histologicamente, observou-se que os animais de C+ apresentaram extensas áreas de necrose, úlceras, infiltrado neutrofílico, além de mineralização. Houve aumento de deposição de colágeno no tratamento CTMs + DAP, no entanto, a vascularização permaneceu inalterada. Este é o primeiro relato usando CTMs e CTMs + DAP como tratamento para loxoscelismo cutâneo e mais estudos são necessários para determinar seu uso como terapia alternativa para lesões demonecróticas causadas pela aranha Loxosceles.

Abstract This study aimed to evaluate the efficacy of mesenchymal stem cells (MSC), alone or associated with dapsone (DAP), in treating dermonecrotic wounds caused by Loxosceles laeta venom. Twenty-five male rabbits were distributed into five groups. Negative control received ultrapure water (C-), whilst all other groups were injected with 20 μg of L. laeta venom. After 4 hours, each group received one of the following treatments: PBS (C+), DAP, MSC, and DAP+MSC. Animals were evaluated daily and photographic records made for analysis of wound area. Twelve days after, animals were euthanized and skin samples removed for histological analysis. We observed that DAP showed the best percentage of wound contraction at day 3. In the treatments using MSCs, a negative value of wound contraction was observed for the isolated MSCs, as well as a lower contraction value for the association of the MSC + DAP when compared to PBS, probably, by the increase in initial infammation after the application of stem cells, due to the fact that MSCs secrete a broad spectrum of bioactive molecules such as cytokines and growth factors that favor regeneration. Histologically, it was observed that animals of C+ showed extensive areas of necrosis, ulcers, neutrophilic infiltrate, and mineralization. Collagen deposition showed increase in MSC+DAP treatment, however vascularization remained unchanged. This is the first report using MSC and MSC+DAP as a treatment for cutaneous loxoscelism and more studies are needed to determine its use as an alternative therapy for dermonecrotic lesions caused by Loxosceles spider.

https://doi.org/10.1590/1809-6891v23e-72573e

Predictors of residential environment stress during social distancing in the pandemic caused by the SARS-CoV-2 virus
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FERREIRA, Karla Patrícia Martins

; OLIVEIRA, Marilia Diógenes

; BARBOSA, Rafael Almeida Ferreira

; MOURA, Rochelle de Arruda

; DELABRIDA, Zenith Nara Costa

; COSTA, Ícaro Moreira

; MELO, Cynthia de Freitas

Estudos de Psicologia (Campinas)

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2022, Volume 39 elocation e200160

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo A pandemia causada pelo Coronavírus da Síndrome Respiratória Aguda Grave 2 (SARS-CoV-2) e o distanciamento social causaram impactos sobre a saúde das pessoas. Dentre eles tem-se o estresse ambiental, compreendido como um conjunto de reações objetivas e subjetivas que ocorrem quando as pessoas enfrentam influências negativas presentes no ambiente. Objetivou-se investigar variáveis associadas ao estresse ambiental domiciliar durante a pandemia de coronavírus no Brasil. Para isso, realizou-se uma pesquisa online com 2000 brasileiros com idade média 38,7 anos (DP = 14,55), sendo que 76,80% eram mulheres. Os resultados mostraram que 81,90% (f = 1.639) da amostra apresentaram algum nível de estresse ambiental, que foi predito pela região geográfica (norte e nordeste brasileiro), menor renda, menor avaliação da qualidade residencial e a falta de um ambiente restaurador na casa. Conclui-se com a identificação de alguns fatores ambientais negativos e positivos associados ao estresse ambiental, que pode auxiliar na implementação de políticas para o enfrentamento da Doença por Coronavírus-19 (COVID-19) e promoção de saúde mental no contexto da pandemia.

Abstract The Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) coronavirus pandemic and social distancing caused impacts on people’s health, among them, environmental stress – a set of objective and subjective reactions that occur when people face negative environmental influences. The objective was to investigate variables associated with residential environment stress during the pandemic in Brazil. An online survey was carried out with 2000 Brazilians with a mean age of 38.7 years (SD = 14.55), 76.80% of whom were women. The results showed that 81.90% (f = 1,639) of the sample had some level of environmental stress, predicted by geographic region (Brazil’s northern and northeastern regions), lower income, lower residential quality scores, and absence of a restorative environment. It is then concluded the identification of some negative and positive environmental factors associated with environmental stress, which may assist in the implementation of policies for coping with 2019 Coronavirus Disease (COVID-19) and promoting mental health in the pandemic context.

https://doi.org/10.1590/1982-0275202239e200160

Outbreak of organophosphorus compound-induced delayed neurotoxicity in water buffaloes
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Santos, Igor Ribeiro dos

; Henker, Luan Cleber

; Pont, Tainah Pereira Dal

; Panziera, Welden

; Pavarini, Saulo Petinatti

; Melo, Marília Martins

; Driemeier, David

Ciência Rural

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2021, Volume 51 N. 10 elocation e20210035

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO: Quarenta búfalos foram simultaneamente tratados com clorpirifós e triclorfom na dose recomendada para bovinos. Após uma semana, 19 animais apresentaram sinais clínicos caracterizados por apatia, diarreia, agressividade, desidratação e incoordenação motora, seguidos por paralisia flácida e decúbito lateral permanente. Todos os búfalos afetados morreram após um curso clínico de 1-4 dias. Redução da atividade da colinesterase sérica em três casos foi indicativa de exposição significativa a organofosforados (OPs). O exame patológico de três búfalos não revelou lesões macroscópicas e histológicas. Por cromatografia em camada delgada, resíduos de clorpirifós e traços de resíduos de triclorfon foram detectados em amostras de tecidos frescos. Os achados epidemiológicos, clínicos, patológicos e toxicológicos foram compatíveis com neuropatia tardia induzida por OPs, uma manifestação neurológica raramente descrita em animais domésticos.

ABSTRACT: Forty 1-2-y-old water buffaloes were simultaneously treated with trichlorfon and chlorpyrifos products in the recommended dose for cattle. After a week, 19 animals started presenting clinical signs characterized by apathy, diarrhea, aggressiveness, dehydration, and motor incoordination, followed by flaccid paralysis and permanent lateral recumbency. All affected buffaloes died after a clinical course of 1-4 days. Reduction of serum cholinesterase activity in three cases was indicative of significant exposure to organophosphorus compounds (OPs). Pathological examination of three buffaloes revealed no gross and histological lesions. By thin layer chromatography, chlorpyrifos residues and trace of trichlorfon residues were detected in fresh tissue samples. The epidemiological, clinical, pathological, and toxicological findings were highly compatible with OPs-induced delayed neurotoxicity, a neurological manifestation rarely described in domestic animals.

https://doi.org/10.1590/0103-8478cr20210035 129 downloads

10.

Adaptação aos Impactos das Mudanças Climáticas na Perspectiva do Plano Diretor da Cidade do Recife
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Melo, Inamara Santos

; Carvalho, Renata Maria Caminha M. O de

; Sobral, Maria do Carmo Martins

; Lyra, Marília Regina Costa Castro

; Silva, Hernande Pereira da

Revista Brasileira de Estudos Urbanos e Regionais

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2021, Volume 23 elocation e202140

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo É complexa a tarefa de definir medidas de adaptação às mudanças climáticas diante da existência de demandas sociais, ambientais e econômicas, sobretudo em cidades que apresentam infraestrutura urbana deficiente. Como resultado da análise do processo de revisão do Plano Diretor do Recife (PDDR), vê-se que a redução das vulnerabilidades socioambientais implica a realização de estudos mais consistentes, que possam acarretar a implementação de medidas estruturadoras, e que a sustentabilidade ambiental demanda uma governança multinível, com reformas políticas em escala global, regional e local, de difícil aplicação no curto prazo, mas necessárias para reorientar as políticas do clima e superar a inabilidade de prover os recursos para uma infraestrutura adequada à adaptação. O caminho para construir uma cidade resiliente, que proporcione um ambiente mais seguro para as futuras gerações, depende de um modelo de desenvolvimento inclusivo, que permita melhorar as condições urbanas para a população e minimizar os impactos ocasionados pelos eventos climáticos extremos.

Abstract Defining measures for climate change adaptation is a complex task given the existence of social, environmental, and economic demands, particularly in cities with poor urban infrastructure. As a result of analyzing the revision process of the Recife Master Plan, it is possible to observe that a reduction in the social and environmental vulnerabilities has implied carrying out more consistent studies, which may entail the implementation of structuring measures, and that environmental sustainability requires multilevel governance, with policy reforms on a global, regional and local scale, difficult to implement in the short term, although necessary for refocusing climate policies and for overcoming the inability to provide resources for a tailored adaptation infrastructure. The path to building a resilient city that provides a safer environment for the future depends on an inclusive development model, which enables the population to improve urban conditions and minimize the impacts brought about by extreme weather events.

https://doi.org/10.22296/2317-1529.rbeur.202140pt

11.

Equine infectious anemia affects the athletic performance of equines from the Brazilian Pantanal region
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Andrade, Débora Roque de Freitas

; Rezende, Adalgiza Souza Carneiro

; Santos, Sandra Aparecida

; Nogueira, Márcia Furlan

; Santiago, Juliano Martins

; Lage, Jéssica

; Melo, Marília Martins

; Reis, Jenner Karlisson Pimenta

; Trigo, Pablo

Pesquisa Agropecuária Brasileira

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oct 2018, Volume 53 N. 10 Pages 1184 - 1188

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo: O objetivo deste trabalho foi avaliar o efeito da anemia infecciosa equina (AIE) no desempenho físico de equinos da região do Pantanal brasileiro. Foram avaliados 16 machos, divididos em dois grupos: 8 soronegativos (G1) e 8 soropositivos (G2) para AIE. Dois testes de esforço progressivo foram realizados, antes (T1) e após (T2) 42 dias de treinamento. Foram registrados frequência cardíaca, concentração de lactato, distância percorrida e níveis de hematócrito. Em ambos os testes, o G1 percorreu uma distância maior. No T2, o G2 apresentou menores níveis de hematócrito e menor velocidade obtida a diferentes concentrações de lactato e frequências cardíacas. O desempenho atlético dos equídeos avaliados é afetado pela anemia infecciosa equina.

Abstract: The objective of this work was to evaluate the effects of equine infectious anemia (EIA) on the physical performance of equines from the Brazilian Pantanal region. A total of 16 males were evaluated, divided into two groups: 8 seronegative (G1) and 8 seropositive (G2) for EIA. Two graded exercise tests were carried out before (T1) and after (T2) 42 days of training. Heart rate, lactate concentration, distance covered, and hematocrit level were recorded. In both tests, G1 covered a greater distance. In T2, G2 had lower hematocrit levels and lower speeds reached at different lactate concentrations and heart rates. The athletic performance of the evaluated equines is affected by equine infectious anemia.

https://doi.org/10.1590/s0100-204x2018001000012 875 downloads

12.

Could mesenchymal stem cell therapy help in the treatment of muscle damage caused by Bothrops alternatus venom?
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Telles, Thalita da Costa

; Botelho, Ana Flávia Machado

; Miranda, Ana Luisa Soares de

; Soto-Blanco, Benito

; Serakides, Rogéria

; Ocarino, Natália de Melo

; Melo, Marília Martins

Ciência Rural

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2018, Volume 48 N. 3 elocation e20170760

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO: O objetivo do presente trabalho foi avaliar a utilização das células tronco mesenquimais (MSC) no tratamento da mionecrose induzida pelo veneno de Bothrops alternatus em ratos. 75 ratos Wistar adultos foram distribuídos em três grupos experimentais. G1 e G2 receberam 120μg de veneno de B. alternatus, enquanto o G3 recebeu apenas 200μL de PBS. Três dias após a administração do veneno, os ratos do grupo G1 foram tratados com 5.0 x 106 MSC, enquanto G2 e G3 receberam exclusivamente PBS. A cada três dias, amostras de sangue e tecido muscular foram coletadas de cinco animais de cada grupo para avaliação bioquímica sérica e patológica, respectivamente. A análise histológica revelou lesão muscular mais intensa após a aplicação das MSC, caracterizada pela desorganização e perdas das fibras musculares, com necrose focal e infiltrado inflamatório mononuclear. É possível concluir que a utilização das MSC para o tratamento da lesão local causada pela inoculação do veneno B. alternatus deteriorou a regeneração muscular e interferiu com o processo de cicatrização.

ABSTRACT: The aim of this study was to evaluate the use of mesenchymal stem cells (MSC) in the treatment of myonecrosis induced by Bothrops alternatus venom in rats. Seventy-five male adult Wistar rats were divided into three experimental groups. G1 and G2 were injected in the gastrocnemius muscle with 120μg of B. alternatus venom, while G3 received 200μL of PBS only. Three days after the venom injection, 12 rats from G1 were treated with 5.0 x 106 MSC in PBS, whereas G2 and G3 rats received PBS. Every three days, blood and muscle samples of five animals from each group were taken for serum biochemical and pathological analyses. Histological examinations showed more intense muscle lesions following MSC treatment, characterized by disorganization and loss of muscle fibers, with focal necrosis and inflammatory infiltration by mononuclear cells. In conclusion, the use of MSC for the treatment of local damage caused by inoculation of B. alternatus venom impaired muscle regeneration and interfered in the healing process.

https://doi.org/10.1590/0103-8478cr20170760 1187 downloads

13.

Different leaf extracts from Brunfelsia uniflora in mice
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Carvalho, Ciro José Sousa de

; Melo, Marília Martins

; Michell, Ana Flávia Ribeiro Machado

; Torres, Bruno Benetti Junta

; Riet-Correa, Franklin

; Guedes, Roberto Maurício Carvalho

; Ferraz, Vany Perpetua

; Soto-Blanco, Benito

; Silva, Silvana Maria Medeiros de Sousa

Ciência Rural

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2018, Volume 48 N. 1 elocation e20170246

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO: No Brasil, pelo menos 16 espécies de plantas tóxicas podem afetar o sistema nervoso central dos bovinos. Recentemente no estado do Piauí, no Nordeste do Brasil, Brunfelsia uniflora foi relatada como causadora de sinais nervosos em jumentos, bovinos e pequenos ruminantes. Para avaliar a toxicidade de B. uniflora, 20 camundongos foram distribuídos em quatro grupos de cinco animais recebendo diferentes extratos da planta. Os extratos de alcalóides, flavonóides, saponinas ou solução salina (grupo controle) foram administrados por gavagem. Após a administração dos extratos, em dose única (5g kg-1), todos os animais foram observados diariamente. Os camundongos que receberam os extratos de B. uniflora apresentaram sinais clínicos moderados a graves, incluindo piloeração, vocalização e convulsões. Todos os camundongos que receberam extrato de saponinas morreram entre 10 e 20 minutos após. A avaliação bioquímica sérica dos animais que receberam saponinas, revelou discretos aumentos nos níveis de proteína total e diminuição nos níveis de magnésio e cloro. Conclui-se que, as saponinas presentes nas folhas de B. uniflora induzem efeitos neurológicos tóxicos agudos e, morte em camundongos.

ABSTRACT: In Brazil, at least 16 poisonous plant species can affect the central nervous system of livestock. Recently in the state of Piauí, Northeastern Brazil, Brunfelsia uniflora was reported as a cause of nervous signs in donkeys, cattle, and small ruminants. In order to assess the toxicity of B. uniflora extracts, 20 Swiss mice were distributed into four groups (n=5) receiving by gavage alkaloids, flavonoids, saponins, or saline (control group). After administration of the extracts in a single dose (5g kg-1), all mice were observed daily for clinical signs. Mice that received the extracts showed moderate to severe clinical signs, including piloerection, vocalization, and seizures. All mice dosed with saponins died between 10 and 20min after administration. Serum biochemical evaluation of animals that received saponins revealed slight increases in total protein levels and decreased magnesium and chlorite levels. In conclusion, saponins of B. uniflora leaves induced acute toxic neurological effects and death in mice.

https://doi.org/10.1590/0103-8478cr20170246 1505 downloads

14.

Avaliação físico-química de amostras de água, sedimento e mata ciliar de uma piscicultura localizada em área agroindustrial à margem do Ribeirão da Mata (MG)
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Torres, Isabela Araujo

; Silva, Tarcisio Martins França e

; Rodrigues, Luciano Santos

; Silva, Israel Jose

; Costa, Thais Ataide

; Soto-Blanco, Benito

; Melo, Marilia Martins

Engenharia Sanitaria e Ambiental

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aug 2017, Volume 22 N. 4 Pages 773 - 780

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO Objetivou-se realizar uma avaliação físico-química de amostras de água, sedimento e mata ciliar em uma piscicultura localizada próxima às margens do Ribeirão da Mata, Minas Gerais. As coletas de água foram semanais em quatro pontos assim denominados: (1) nascente; (2) entrada do sistema; (3) efluente concentrado e (4) ponto de lançamento. Foram monitorados os seguintes parâmetros físico-químicos: temperatura (ºC), pH, oxigênio dissolvido, demanda bioquímica de oxigênio, fósforo total, alcalinidade, sólidos dissolvidos totais, fosfato, nitrato, nitrito, sulfato, amônia e fenol das amostras de água. Foram pesquisados metais pesados (chumbo, cádmio, mercúrio e zinco) e agrotóxicos (organoclorados, organofosforados, clorofosforados, carbamatos, piretroides e rodenticidas anticoagulantes) nas amostras de água, sedimento e mata ciliar. Alcalinidade e sólidos totais apresentaram as maiores concentrações, provavelmente devido às características geológicas,por se tratar de região cárstica. Fenol, em todos os pontos, e fosfato, nos pontos 3 e 4, apresentaram valores acima dos limites permitidos para a classe II de água doce, segundo a Resolução CONAMA nº 357. Os outros parâmetros (amônia, nitrato, nitrito e sulfato), em todos os pontos de coleta, apresentaram baixos valores. Nas amostras de água não foram detectados chumbo e mercúrio; zinco apresentou valores abaixo de 0,007 mg.L-1. As amostras de sedimento apresentaram valores de chumbo entre 11,1566 e 37,0438 mg.L-1, estando 12 dessas acima do valor de referência de qualidade. Também em todas as amostras de sedimento foi detectado mercúrio, que variou de 0,35 a 0,82 mg.L-1. Em relação ao cádmio, esse não foi detectado nas amostras de sedimento e plantas. Também não foram detectados agrotóxicos em nenhuma das amostras estudadas.

ABSTRACT The aim of this study was to carry out a physicochemical analysis of water, sediment and riparian vegetation in a fish farm located near the Ribeirão da Mata basin in Minas Gerais State (Brazil). The water samples were collected weekly at four points: (1) source, (2) system entry, (3) discharge point, (4) and point release. The monitored physicochemical parameters in the water samples were: temperature (ºC), pH, dissolved oxygen, biochemical oxygen demand, total phosphorus, alkalinity, total dissolved solids, phosphate, nitrate, nitrite, sulfate, ammonia and phenol. Heavy metals (lead, cadmium, mercury and zinc) and pesticides (organochlorine, organophosphates, clorofosforados, carbamates, pyrethroids and anticoagulant rodenticides) were searched in the samples of water, sediment and riparian vegetation. Alkalinity and total solids presented the highest concentration, probably due to geological features of a carstic area. Phenol, at all points, and phosphate, at points 3 and 4, showed values above the limits allowed for class II freshwater, according to the CONAMA Resolution n. 357. The other parameters (ammonia, nitrate, nitrite and sulfate) in all sampling sites showed low values. It was not detected lead and mercury in the water samples; and zinc values were below 0.007 mg.L-1. However, the sediment samples showed lead values from 11.1566 to 37.0438 mg.L-1, with 12 of those samples above the quality reference value. In addition, it was detected mercury in all sediment samples, which ranged from 0.35 to 0.82 mg.L-1. It was not detected cadmium in samples of sediment neither plants. No pesticides were detected in the samples.

https://doi.org/10.1590/s1413-41522017110861 3677 downloads

15.

Cardiorespiratory alterations in rodents experimentally envenomed with Hadruroides lunatus scorpion venom
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Costal-Oliveira, Fernanda

; Guerra-Duarte, Clara

; Oliveira, Maira Souza

; Castro, Karen Larissa Pereira de

; Lopes-de-Sousa, Leticia

; Lara, Aline

; Gomes, Enéas Ricardo de Morais

; Bonilla, Cesar

; Guatimosim, Sílvia

; Melo, Marília Martins

; Chávez-Olórtegui, Carlos

Journal of Venomous Animals and Toxins including Tropical Diseases

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2017, Volume 23 elocation 2

Abstract: En | Text: En | PDF: En

Abstract Background Hadruroides lunatus is the most abundant scorpion species in the Peruvian central coast, where most of the accidents involving humans are registered. In spite of its prevalence, there are only very few studies on H. lunatus envenomation. The aim of the present study was to analyze the cardiorespiratory alterations caused by H. lunatus envenomation in rodents. Methods Wistar rats injected with H. lunatus scorpion venom were submitted to electrocardiography. After euthanasia, rat lungs were collected and histopathologically analyzed. Mouse cardiomyocytes were used to perform immunofluorescence and calcium transient assays. Data were analyzed by ANOVA or Student’s t-test. The significance level was set at p< 0.05. Results It was observed that H. lunatus venom increased heart rate and caused arrhythmia, thereby impairing the heart functioning. Lungs of envenomed animals showed significant alterations, such as diffuse hemorrhage. In addition, immunofluorescence showed that H. lunatus venom was capable of binding to cardiomyocytes. Furthermore, mouse ventricular cardiomyocytes incubated with H. lunatus venom showed a significant decrease in calcium transient, confirming that H. lunatus venom exerts a toxic effect on heart. Conclusion Our results showed that H. lunatus venom is capable of inducing cardiorespiratory alterations, a typical systemic effect of scorpionism, stressing the importance of medical monitoring in envenomation cases.

https://doi.org/10.1186/s40409-016-0076-5 1143 downloads

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